A. Malčeski and V. Manova-Erakovikj, “SOME 2-SUBSPACES OF 2-SPACE”, Mat. Bilt., vol. 35, no. 1, pp. 27–39, Jan. 2011, Accessed: Aug. 14, 2026. [Online]. Available: https://bilten.smm.org.mk/index.php/bilten/article/view/1765